MBS-5965: store non-precomposed relationship info in 'Remove Relationship' edits so we don't store translated information in edit data.
MBS-6243: workaround DateTime::Duration's inconsistency with days/minutes vs. weeks/hours definitions
MBS-6637/MBS-6638: redirect POST with 307, don't redirect set-beta-preference page
Merge branch 'mbs-6243' into beta

* mbs-6243:
  MBS-6243: workaround DateTime::Duration's inconsistency with days/minutes vs. weeks/hours definitions
Merge branch 'mbs-6637-6638-beta-redirection' into beta

* mbs-6637-6638-beta-redirection:
  MBS-6637/MBS-6638: redirect POST with 307, don't redirect set-beta-preference page
Merge branch 'mbs-5965-remove-rel-translated-attributes' into beta

* mbs-5965-remove-rel-translated-attributes:
  MBS-5965: store non-precomposed relationship info in 'Remove Relationship' edits so we don't store translated information in edit data.